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Max-Min Fair Bandwidth Allocation Algorithms for Packet Switches

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2 Author(s)
Deng Pan ; Dept. of Comput. Sci., State Univ. of New York, Stony Brook, NY ; Yuanyuan Yang

With the rapid development of broadband applications, the capability of networks to provide quality of service (QoS) has become an important issue. Fair scheduling algorithms are a common approach for switches and routers to support QoS. All fair scheduling algorithms are running based on a bandwidth allocation scheme. The scheme should be feasible in order to be applied in practice, and should be efficient to fully utilize available bandwidth and allocate bandwidth in a fair manner. However, since a single input port or output port of a switch has only the bandwidth information of its local flows (i.e., the flows traversing itself), it is difficult to obtain a globally feasible and efficient bandwidth allocation scheme. In this paper, we show how to fairly allocate bandwidth in packet switches based on the max-min fairness principle. We first formulate the problem, and give the definitions of feasibility and max-min fairness for bandwidth allocation in packet switches. As the first step to solve the problem, we consider the simpler unicast scenarios, and present the max-min fair bandwidth allocation algorithm for unicast traffic. We then extend the analysis to the more general multicast scenarios, and present the max-min fair bandwidth allocation algorithm for multicast traffic. We prove that both algorithms achieve max-min fairness, and analyze their complexity. The proposed algorithms are universally applicable to any type of switches and scheduling algorithms.

Published in:

Parallel and Distributed Processing Symposium, 2007. IPDPS 2007. IEEE International

Date of Conference:

26-30 March 2007